Question

in triangle ABC, DE is parellel to BC.if AE=a, EC=b , DE=x and BC= y, then x=_____​

Answer 1

Answer:

x=4

Step-by-step explanation:

In Δ ABC, DE ∥ BC

∴DBAD=ECAE

(By basic proportionality theorem)

⇒x−2x=x−1x+2

⇒x(x−1)=(x+2)(x−2)

⇒x2−x=x2−4

⇒x=4.